Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e2450c1717cb20…

MALICIOUS

PDF

40.8 KB Created: 2021-05-22 17:06:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1f85fc8731e5b35f7899c03f1318f68b SHA-1: 6642baf041e1711ef208cd5289efcbc401663b48 SHA-256: 72e2450c1717cb20f7726faae85f8e6b487c661bca50b952e4d49c9f3d2934b1
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector URL. The document body explicitly mentions 'Free Robux Generator No Human Verification 2021' and includes a call to action to access a Roblox generator. This indicates a social engineering tactic to trick users into visiting a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0116

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/free-robux-generator-no-human-verification-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f37.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F37 29176 bytes
SHA-256: 271cecaab99cfa483dbc9f4a042593117f58b39511a9ba5517bd77f9235eeab6
font_01_sfnt_off000071b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B8 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00007b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B79 19260 bytes
SHA-256: cfeb00e99c7da41c79bd6814c2de1bf58f441159bdfe452787b9448ffd27beb4

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